These entries are queried from radb.net using whois, you can try my project getting these.
:AS19826 route: 12.3.32.0/24 descr: Comcast Cable Communications, Inc 1800 Bishops Gate Blvd Mount Laurel, NJ 08054 origin: AS19826 remarks: Proxy for EDIA customer Universal mnt-by: MAINT-AS7922 changed: courtney_smith [at] cable.comcast.com 20210706 source: RADB last-modified: 2023-11-13T16:07:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 12.3.40.0/24 descr: Comcast Cable Communications, Inc 1800 Bishops Gate Blvd Mount Laurel, NJ 08054 origin: AS19826 remarks: Proxy for EDIA customer Universal mnt-by: MAINT-AS7922 changed: courtney_smith [at] cable.comcast.com 20210706 source: RADB last-modified: 2023-11-13T16:07:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source